Right kinda confusing title but allow me to explain. Basically, I have a Windows 8 laptop I use for University but I also use the computers in University that use Windows 7. For some reason, Windows 8 "locks" my ext. hdd from use on the Windows 7 machines? For example, If I try to overwrite a Word document that was created on my Windows 8 machine on the university computers I am unable to do it? Like everything suddenly turns read-only once on the Windows 7 machine? Both use Office 2013 but I am unsure why these things happen. I remember this happened with Windows 8 once. I plugged an ext. hdd into Windows 8 beta and once I downgraded It was read-only. Is this something to do with the different OSes? Thanks.